Biases of the ordinary least squares and instrumental variables estimators of the intergenerational earnings elasticity : revisited in the light of panel data

The OLS estimator of the intergenerational earnings correlation is biased towards zero, while the instrumental variables estimator is biased upwards. The first of these results arises because of measurement error, while the latter rests on the presumption that the education of the parent family is an invalid instrument. We propose a panel data framework for quantifying the asymptotic biases of these estimators, as well as a mis-specification test for the IV estimator. [Author]

Determinação de manganês em presença de ferro: análise de solo por ativação neutrônica instrumental

A técnica analítica nuclear de ativação neutrônica é multielementar, precisa, exata e, além de outras características, tem sido indicada como técnica primária na determinação elementar principalmente de solo. Entretanto, ao ser aplicada, não está isenta de interferências inerentes à técnica, como a ocorrência de reações de interferências primárias, cuja contribuição depende das características do fluxo de nêutrons do reator, do local de irradiação, etc. Essas reações ocorrem durante a irradiação, quando a amostra é submetida ao fluxo de nêutrons no reator no qual há contribuição de nêutrons de diversas energias. Uma interferência que pode ser significativa é a determinação de Mn em presença de Fe, pois a formação extra do 56Mn poderá não permitir afirmar se a concentração de Mn determinada deve-se à interferência do Fe ou não. Para verificar se essa interferência é significativa, ao analisar amostras com elevada concentração de Fe no reator TRIGA MARK I IPR-R1 do CDTN/CNEN, foi realizado este estudo, visando determinar o Mn em solo do Quadrilátero Ferrífero, Minas Gerais, Brasil, no qual há ocorrência de minérios com teores da ordem de 40 a 60 % em Fe. Os resultados mostraram que na reação de 56Fe com nêutrons rápidos a formação de 56Mn é pouco significativa, não havendo necessidade de aplicar a correção da interferência.

Conducta instrumental del chimpace (Pan troglodytes) en su habitat natural

La constatación del uso sistemático de instrumentos por los chimpancés en su habitat natural ha planteado el problema de la aplicación del término cultura a un primate no humano. Una de las características de la cultura es la aparición de variantes conductuales en grupos separados. El propósito de este trabajo es revisar, con los datos disponibles en la actualidad, la hipótesis formulada por Sabater Pi (1974b) de que existen tres zonas culturales en los chimpancés e intentar identificar el origen ecológico y/o social de estas diferencias.

Ordenación tipológica del instrumental de pesca en bronce ibero-romano

Tradicionalmente, las noticias sobre actividades pesqueras y sus industrias derivadas de salazón y conservas han estado circunscritas en la Península Ibérica a la zona del sudeste, en relación directa con la presencia colonial fénico-púnica y el posterior desarrollo de idénticas actividades en época romana. Por el contrario, y en relación con el litoral catalán, solamente Avieno, al citar la «marisma feraz siempre en peces», situada en las cercanías de Callípolis y Tito Livio, al hablar de que los colonos griegos de Ampurias «al principio para 'mantenerse se fiaban delmar», comentan las posibilidades piscícolas de la zona.

Instrumental leadership: An extension of the Full-Range Leadership Theory

From a theoretical perspective, an extension to the Full Range leadership Theory (FRLT) seems needed. In this paper, we explain why instrumental leadership--a class of leadership includes leader behaviors focusing on task and strategic aspects that are neither values nor exchange oriented--can fulfill this extension. Instrument leadership is composed of four factors: environmental monitoring, strategy formulation and implementation, path-goal facilitation and outcome monitoring; these aspects of leadership are currently not included in any of the FRLT's nine leadership scales (as measured by the MLQ--Multifactor Leadership Questionnaire). We present results from two empirical studies using very large samples from a wide array of countries (N > 3,000) to examine the factorial, discriminant and criterion-related validity of the instrumental leadership scales. We find support for a four-factor instrumental leadership model, which explains incremental variance in leader outcomes in over and above transactional and transformational leadership.

Handbook of instrumental techniques for materials, chemical and biosciences research

This Handbook contains a collection of articles describing instrumental techniques used for Materials, Chemical and Biosciences research that are available at the Scientific and Technological Centers of theUniversity of Barcelona (CCiTUB). The CCiTUB are a group of facilities of the UB that provide both the research community and industry with ready access to a wide range of major instrumentation.Together with the latest equipment and technology, the CCiTUB provide expertise in addressing the methodological research needs of the user community and they also collaborate in R+D+i Projectswith industry. CCiTUB specialists include technical and Ph.D.-level professional staff members who are actively engaged in methodological research. Detailed information on the centers’ resources andactivities can be found at the CCiTUB website www.ccit.ub.edu ...

Gesture sampling for instrumental sound synthesis: violin bowing as a case study

This paper presents a framework in which samples of bowing gesture parameters are retrieved and concatenated from a database of violin performances by attending to an annotated input score. Resulting bowing parameter signals are then used to synthesize sound by means of both a digital waveguide violin physical model, and an spectral-domainadditive synthesizer.

[Archives de la Parole]. , [Salona Re Balam Mora] : Jman Kalgan [i.e. Aiman Kalyan] (Hindustani Song) / William Sinkler Darby, collecteur ; Jazal Hossein Khan [i.e. Fazal Hussain Khan], chant ; accompagnement instrumental (harmonium indien, tablâ)

[Traditions. Asie. Inde]

[Archives de la Parole]. , Hackani (Hindustani Song) / William Sinkler Darby, collecteur ; [Miss] Hingan Bai, chant ; accompagnement instrumental (harmonium indien, tabla et flûte)

[Traditions. Asie. Inde]

[Archives de la Parole]. , Gour sarang (Hindustani Song) [sic] / William Sinkler Darby, collecteur ; Neekunjo Bebary Dutt [i.e. Babu Nikunja Behari Dutt], chant ; accompagnement instrumental (tabla, flûte et harmonium indien)

[Traditions. Asie. Inde]

[Archives de la Parole]. , Jhijit khambag (Hindustani Song) / William Sinkler Darby, collecteur ; Dijendra Nath Bagchi [i.e. Babu Dejendra Nath Bagchi], chant ; accompagnement instrumental (tablâ, flûte et harmonium indien)

[Traditions. Asie. Inde]

[Archives de la Parole]. , Bhairobi (Hindustani Song) / William Sinkler Darby, collecteur ; Abdool Gafoor [i.e. Ustad Abdul Gafur], chant ; accompagnement instrumental (tabla, flûte et harmonium?)

[Traditions. Asie. Inde]

[Archives de la Parole]. , Multan [i.e. Multani] (Hindustani Song) / William Sinkler Darby, collecteur ; Munah Khan [i.e. Munne Khan Kadar], chant ; accompagnement instrumental (harmonium indien, tablâ)

[Traditions. Asie. Inde]

[Archives de la Parole]. , Khambag (Bengali Comic Song) / William Sinkler Darby, collecteur ; Monamatha Nath Roy [i.e. Babu Manmatha Nath Ray], chant ; accompagnement instrumental (harmonium indien, tablâ)

[Traditions. Asie. Inde]

[Archives de la Parole]. , Jhijit (Bengali Song) / William Sinkler Darby, collecteur ; Dijendra Nath Bagchi [i.e. Babu Dejendra Nath Bagchi], chant ; accompagnement instrumental (tablâ, harmonium indien)

[Traditions. Asie. Inde]